.container {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgb(249 250 251);
  padding: 1rem;
}

.card {
  width: 100%;
  max-width: 400px;
  background: transparent;
  border: none;
  box-shadow: none;
  text-align: center;
}

/* 移动端样式 */
@media (max-width: 640px) {
  .container {
    padding: 0.5rem;
  }

  .card {
    max-width: 320px;
  }

  .button {
    min-width: 90px;
    height: 32px;
    margin: 4px;
  }
}

/* 平板样式 */
@media (min-width: 641px) and (max-width: 1024px) {
  .container {
    padding: 1rem;
  }

  .card {
    max-width: 360px;
  }
}

/* PC端样式 */
@media (min-width: 1025px) {
  .container {
    padding: 1.5rem;
  }

  .card {
    max-width: 400px;
  }
}
